View Compilation Error

0_0_35933170_21571.cpp: In function 'int main()':
0_0_35933170_21571.cpp:12:16: error: 'n' was not declared in this scope
         cin >> n >> k;
                ^
0_0_35933170_21571.cpp:12:21: error: 'k' was not declared in this scope
         cin >> n >> k;
                     ^